Grubbing attachment for tractors



Feb. 5, 1952 T. A. GUESS GRUBBING ATTACHMENT FOR TRACTORS 2 SHEETS-Si-IEET 1 Filed Nov. 26, 1946 IN V EN TOR. 7741 4 0M @0555 Feb. 5, 1952 T. A. GUESS 2,584,368

GRUBBING ATTACHMENT FOR TRACTORS Filed Nov. 26, 1946 2 SHEETS-SHEET 2 Patented Feb. 5, 1952 UNITED STATES PATENT OFFICE GRUBBING ATTAGHMENT FOR TRAGTORS Taylor 5. Guess, Kensington- Ga. Application November 26, 1946-, serial No. 712,311

1 Claim.

This invention relates to a grubbing attachment for tractors, and has for one of its objects the production of a simple and eflicient means for supporting the teeth'of the grubbing attachment on a frame which is adapted to be supported on the front of a tractor or other vehicle, to provide a pusher-type or crawler type implement.

A further object of this invention is the pro:- duction of a simple and efiicient tooth-supporting means for a grubbing attachment to facilitate the mounting and replacement of the teeth when repairs are necessary. I

. Other objects and advantages of the present invention will ap ear throughout the iollowing specification and claim.

1n the drawings:

Figure l is a top plan view of the attachment;

Figure 2 is a front elevational view thereof;

Figure 3 is an end elevational view, partly in section;

Figure 4 is a sectional view taken on line- 4 4 of Figure 2;

Figure 5 is a sectional view taken on line 5-5 of Figure 2;

Figure 6 is a front elevational view of one of the teeth; 1

Figure '7 is an enlarged transverse sectional view taken on line 1-1 of Figure 6; i

Figure 8 is a perspective View of one of the teeth-retaining or holder plates; v

Figure 9 is a fragmentary top plan view of a modified form of the attachment showing the pushei plate which replaces; the center. tooth when the device is used to push down trees which are toolarge to be removed by the teeth;

Figure 10 is a fragmentary top plan view of the base plate.

By referring to the drawings, it will be seen that H] designates the base plate of the attachment, which may be of any desired lengthor width depending upon the kind and the strength of the tractor and the kind of work to be'done bythe implement. The base plate In is provided with a. plurality of substantially V-shapecl channels l I which extend transversely across the front face of the base plate I 0, or'vertically thereof.

A plurality of teeth I2 are fitted in the channels II and the base plate In and teeth are inclined rearwardly from the bottom toward the upper ends thereof, as shown in Figures 3 to .5 inclusive. As shown in detail in Figures 6 and 7, the teeth l2 are preferably square in cross-section. The rear corners or edges of the teeth fit in the substantially V-shaped channels of the base plate 10 and the forward corners or edges face in a. for- 2 Ward direction as shown in Figures 1 and 2. Each tooth 12 is provided with a pointed upper end I3 and a pointed lower end It. Each tooth I2 is also provided with spaced lugs l5 upon the two converging forward faces, as shown in detail in Figures 6 and 7 and these lugs l5 are arranged in spaced longitudinal ali'gmnent and are also arranged in pairs transversely of the teeth l2.

The teeth [2 are firmly held within the channels I i by means of the teeth-retaining or holderplates l6, and these plates l6 are provided with beveled side teeth-engaging; edges I! which fit snugly in engagement withthe converging-fob ward faces or the teeth l2 toretain the teeth 12 within thechannels II. The beveled side edges ll of. the plates [6 are provided with notches l8 which are. shapedvto snugly fit over the lugs I5 and hold the teeth I 2 against longitudinal dis placement'orsliding movement within the chan nels H. The plates l6 are anchored in clamped position over the teeth 12 by means of the bolts H which pass through the plates l6 and through the base plate m.

As shown in Figures 1, 2 and 5, the central tooth I2 is preferably shorter than the other teeth l2, so that the tooth I 2* will not interfere with the connection 20 of the tractor which engages the connecting eyes 2| carried at the center of the base-plate m.

The base plate I0 is carried by end plates 22 which are secured in any desired manner to the tractor ush arms 23. These arms 23 maybe of an type 0'! design and may enga e the end plates 22 and the base plate In in any conventional mam ner without departing from the spirit of the invention. A brace of any type may engage theeye 24 carried at the upper rear end of each end plate 22. One portion of the push arm 23 at each end of the base plate In preferabl engages a'suitable slotted lug 25 carried upon the rear face of the base plate In near each end of the plate Ill-see Figure l and also Figure 4.

As shown in Figure 9, the center front plates 16 and center tooth l2 may be removed when it is desired to do so and may be replaced by a pusher-plate 26. This pusher-plate 26 is provided with a tapering rib 21 which fits in the central channel H from which the central tooth l2 has been removed. This pusher-plate 26 is retained in position by means of bolts [,9 and the beveled side edges I! engage the adjoining teeth l2 in a manner similar to that illustrated and described with respect-to Figures 1 and 2.

It should be understood that the tractor arms 23 may vary in length and design according to.

the size of the tractor, and any type of hitch may be employed without departing from the spirit of the invention. The present invention therefore embodies the base plate structure, its mounting, and the teeth, and means for securing the teeth in place as well as the pusher-plate structure shown in Figure 9. It should be further understood that certain changes may be made in detail construction without departing from the spirit of the invention so long as these changes fall within the scope of the appended claims.

As shown in Figures 1 and 2, the teeth I! may extend slightly above the upper smooth edge of the clamping plates [6 and the base plate l0, so as to facilitate the passing of particles over the top edge of the implement. For the same reason all of the bolts l9 and I! are preferably countersunk. The present device is especially adapted for clearing land and for uprooting trees as well as removing stumps and roots from the ground, the present device preparing the ground in an eflicient manner so as to leave the land clear and in such a condition that a mower or any other piece of farming machinery may be immediately used.

The present device has been designed as an attachment to be used upon the front end of any type of crawler tractor whether thetractor be cable-operated or operated by a hydraulic lift. The device may be adapted to either type of power unit. Furthermore, the length of the blades may be varied'without departing from the spirit of the invention, to permit a more or less number of teeth to be used. It should be understood that the teeth 12 and I2 may be adjusted as to length by placing the teeth in varyin positions to cause the lugs l5 to register with selected notches I8 in the plates 16. By using this device in front of a tractor, the driver is enabled to see the work at all times and is able to regulate the depth of the teeth by the use of the control lever since the entire blade may be raised and lowered in the conventional manner. The teeth as above stated may be individually adjusted to allow the surface to be broken at a depth to suit and to lessen the burden on the driver or operator.- The device may be used to give a rolling pushing action,'or may be used to carry a number of trees or great piles of brush and rubbish to a selected location. By adjusting the teeth the desired clearance may be obtained between the surface to be broken and the bottom edge of the plate so that dirt or any particles may pass between the teeth and not become clogged under the blade.

As stated above, the pusher-plate shown in Figure 9 may be used in place of the center tooth when it is desired to push down trees which are too large to be broken up by the teeth. By means of the present device, a wooded area may be cleared and cultivated in one operation.

Having described the invention, what is claimed as new is:

A grubbing attachment for tractors comprising a'base plate having a plurality of channels extending transversely across the front face thereof, a plurality of teeth fitted in said channels, a plurality of teeth-retaining plates secured to the base plate intermediate the teeth, each plate having a pair of bevelled parallel side teeth-engaging edges, one retaining plate fitting between two spaced teeth to facilitate removal of the individual teeth, each tooth having rearward tapering sides fitting in the channels of the base plate and forwardly tapering sides, the forward tapering sides of each tooth being engaged by the bevelled teeth-engaging edges of adjoining teethretaining plates, means fastening the teethretaining plates upon the base plate to lock the bevelled edges of the plates in clamped relation upon the forward tapering sides of the teeth and to lock the rearward tapering sides of the teeth in the transverse channels of the base plate, said teeth and bevelled side edges of the retaining plates having interfitting lugs and sockets to lock the teeth against transverse movement across the face of the base plate, all of the plates extending flush with respect to each other and the plates defining a flat uninterrupted surface across the front of the attachment from the top to the lower edges of the plates to facilitate the shedding of material falling upon the front face of said plates.

' TAYLOR A. GUESS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

